Range-finder.



No. 719,011. PATENTED JAN. 27, 1903.

A. KENNEDY.

RANGE FINDEN.

APPLOATION FILED IABZG, 1902.

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llNriEn TETES- PATENT GFFICE.

ALEXANDER KENNEDY, OF PONOKA, CANADA.

RANGE-FINDER.

SPECIFICATION forming part of Letters Patent No. '719,01 1, datedJanuary 27, 1903.

Application filed March 26, 1902. Serial No. 100,073. (No model.)

To all whom, t nto/y concern,.-

Beit known that I, ALEXANDER KENNEDY, a subject of the King of GreatBritain, residing at Ponoka, in the Province of Albert-a, North -WestTerritories, Canada, have in'- vented new and useful Improvements inRange-Finders, of which the following is a specication.

This invention relates to certain new and useful improvements inrange-finders; and it has for its objects, among others, to provide asimple and cheap device readily attachable to the barrel of a firearmand which requires no calculation on the part of the marksman.

My device is speedily used and perfectly reliable and correct. It willsave a great amount of ammunition and almost do away with targetpractice, will save the lives of many soldiers who use it and willenable them to destroy many of the enemy, and will make the individualsoldierindependent of orders from the officers as to what distance tofire. In scouting it will become indispensable. It will enable a portionof rifle-drill now done by guesswork to be done with geometricalprecision. It can be readily and quickly applied to the barrel of anygun now in use and does not interfere with the sights thereof.

Other objects and advantages of the invention will hereinafter appear,and the novel features thereof will be speciiically defined by theappended claims.

The invention is clearly illustrated in the accompanying drawings,which, with the numerals of reference marked thereon7 form a part ofthis specification, and in which- Figure l is a perspective view showingthe range-Ender in position on the barrel of the firearm. Fig. 2 is adiagrammatic View illustrating the manner of use. Fig. 3 is a back Viewof the range-finder. Fig. 4 is a substantially centrallongitudinalsection through the same with the parts in the position inwhich they are shown in Figs. l and 2.

Like numerals of reference indicate like parts in the different views. t

Referring now to the drawings, l designates the body portion of therange-finder, shown in this instance as being provided with a pluralityof openings 2 for the reception of the means by which it is secured inposition on the gunbarrel, the attaching means being of any suitableform adapted to the purpose. This body portion is provided near each endwith two parallel slit-s 3, as seen best in Fig. 3, forming thespring-tongues 4, one at each end, and the portions upon opposite sidesof these tongues are bent or rolled to form the sockets 5 for thereception of the pintles or hinge-pins 6,which pass also through thecoinciding sockets 7, formed on the adjacent ends of the wings 8, thethree sockets and pin forming a hinge upon which the wing may turn.

The tongues 4 are curved, as seen best in Fig. 4, and bear with theirfree ends upon the outer faces of the wings, as shown in said view, andserve to hold the same with a spring tension, so as to hold them in Yanyposition into which they are turned, but are primarily for the purposeof stopping the wings when they assume a position that is at rightangles to the body portion and prevent their going any farther, so theywill be held in parallel relation, as seen in Figs. l, 2, and 4.

The wings 8 are provided each with a plurality of notches 9, in thisinstance shown as ten in number; but it is evident that this number maybe varied as may be desired. i These notches are formed along one sideof the slots 10, which extend lengthwise ofthe wings, and in the presentinstance the thousand yards, as indicated in Fig. 2, is on a scale offive inches. Supposing or imagining a triangle the perpendicular ofwhich is one thousand yards long and an inch and a quarter at one endand nothing at the other, the inch-anda-quarter end being divided intoten equal parts, then lines drawn from these ten divisions, which inthis instance are the ten notches 9, parallel with the outsideline ofthe triangle would divide the other side or hypotenuse of thethousand-yard triangle into ten equal parts of one hundred yards each.The notches are merely a portion of these bisecting lines and cut theangleline Vor line of [ire into ten equal parts. This will be clearlyunderstood upon reference to Fig. 2. This will be found most accurateand reliable, and with a little practice it will become very efficientin the hands of an expert. calculation. -Y

In practice the finder is applied to the lefthand side of therifle-barrel, where it will not interfere with the elevation-sights.

It requires no The device being in position as shown and the uitgearranged parallel to each other, the notch at the right on the wingnearest the eye and its opposite notch in the other wing is alined withthe object of which the range is desired. Holding them alined with theobject, the eyeis passed along the other notches until two oppositenotches come in exact. line with the object and the hypotenuse of thetriangle. The figures below these two notches will be the number ofyardsin hundreds that the object is away.

From the foregoing it will be seen that I have devised a simple andcheap yet most efficient form of range-finder, and while the structuralembodiment of my invention as herein disclosed is what I at the presenttime considered the preferable one it is evident that thesame issnbjectto variations,changes, and modifications without departing fromthe spirit of the invention or sacrificing any of its advantages, andItherefore do not wish to be restricted to the details herein shown, butreserve the right to make such changes, variations, and modifications ascome properly within the scope ofthe protection prayed.

It will be observed that the back hinge is i iigured out a certaindistance shorter than the iirst, it being a certain number of yards tothe iirst notch.

First aline the notches marked O on the right-hand side of theinstrument with the object the range of which itis desired to find,holding the instrument steadynpon the object, then pass the eye towardthe left of the instrument until the object comes in sight through twonotches corresponding in number from the right of the anges. Then thefigure marked opposite those two notches vis the number in hundreds ofyards that the object is from the observer. For instance, if it is, say,a duck at which one is aiming, and it is one hundred yards away, it willappear opposite the notches, marked 1. If it is five hundred yards away,it will appear opposite the corresponding notches marked 5. If theobject does not come opposite corresponding notches, it will appear alittle to one side. The corresponding notches upon which each flangemust be used, then the figures marked opposite those correspondingnotches will be found perfectly clear. The two corresponding notches arebut a portion of a straight line that bisects the fire-line at thedistance marked opposite each pair upon the anges. Henceitwillnot do tolook anglingly across the flanges.

Vhat I claim as new isl. A range-finder embodying a body portion andwings pivotally mounted thereon and having parallel slots and notchesalong one side of said slots, with the notches ofthe two slotscoincident, as set forth.

2. A range-iinder having a body portion to be attached to the side of aride-barrel, and wings pivotally mounted on the ends of the body portionand having longitudinal slots and the said slots notched alongcorresponding` edges, as set forth.

3. A range-finder comprising a body portion with tongues at its ends,and wings pivoted to the ends of the body portion and having notches,the said tongues serving to stop the outward movement of the wings ontheir pivots, as set forth.

4. A range-finder comprising a body portion with slits at its endsforming tongues and hinge-piu sockets upon opposite sides of thetongues, the tongues being curved, and wings having hinge-pin socketsheld between the sockets of the body portion, the said wings havinglongitudinal slots notched along corresponding edges, as described.

In witness whereof I have hereunto set my hand in the presence of twowitnesses.

ALEXANDER KENNEDY.

Witnesses:

F. M. Lan, EUGENE RHIAN.

